KR20010057609A - Apparatus for blocking the thermal of rotary kiln - Google Patents

Abstract

PURPOSE: Provided is a heat breaker in a rotary kiln, which breaks high temperature radiation heat transmitted toward a cooler so that it improves efficiency in cooling limestone fired from the small volume of cool air. CONSTITUTION: In the rotary kiln(5) which burns limestone as heat source in a burner(9), the heat breaker comprises the parts of: a fireproof part wherein a fixed cylinder(11) is placed with multiple air lines extended outwardly and an internal/intermediate/external fireproof plate(12,13,14) which are formed multiple injection holes to break radiation heat transferred to the cooler side; and a supply part for compressed air which supplies compressed air and includes compressed air line(31) to inject compressed air into the rotary kiln.

Description

Thermal barrier device of rotary kiln {APPARATUS FOR BLOCKING THE THERMAL OF ROTARY KILN}

The present invention relates to a heat shield device for a rotary kiln, which blocks radiant heat transmitted to the cooler side in a rotary kiln for heating and calcining limestone, and which can cool quicklime calcined by a small amount of cooling air.

In general, a rotary kiln 5 is installed between the apparatus 6 for preheating and discharging limestone and the cooler 2, as shown in FIG. 1, and is combined with the kiln support tires 5a and 5b. As a hollow-cylindrical cylindrical facility rotated by a kiln rotary roller (5c) (5d), the quicklime calcined as a heat source of a burner (9) is the cooler (2) by the inclination and rotation of the rotary kiln (5). The stored quicklime is stored inward and stored out as a dispensing facility 4 after being cooled by the cooling air supplied from the quicklime cooling fan 3 mounted at the bottom of the cooler 2.

The problem that occurs during the process of calcining quicklime in the rotary kiln (5) is that the high temperature 1100 to 1200 ° C formed by the burner (9) to burn quicklime is the most radiant heat and part of the conduction heat to the cooler (2) While being directly transmitted to the cooler 2 and the quicklime being cooled, the calcined quicklime is not properly cooled while maintaining the internal space of the cooler 2 at a high temperature.

Accordingly, the temperature inside the kiln 5 is lowered due to more cooling air input, and the amount of waste gas is increased due to the excessive input of cooling air. Thus, a fan for discharging the waste gas and air inside the kiln 5 to the outside. It causes a throughput limit of the discharge facility as shown in (7), and as a result, the flow rate in the kiln 5 is slowed, and the cooling of the cooler 2 is not performed smoothly, but also the yield of calcined quicklime is greatly reduced.

In addition, the risk of fire and burnout of the discharge facility 4 is always inherent by external discharge of uncooled high-temperature quicklime, causing a problem that air pollution is aggravated by an increase in exhaust gas.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and its object is to block the high temperature radiant heat transmitted from the inside of the rotary kiln to the cooler side, and improve the cooling efficiency of calcined quicklime as a small amount of cooling air. It is intended to provide a thermal cutoff device of a rotary kiln.

1 shows a typical rotary kiln

Figure 2 is a state diagram showing the flow of radiant heat and cooling air in a typical rotary kiln,

Figure 3 is an installation state showing a heat shield of the rotary kiln according to the present invention,

Figure 4 is an exploded perspective view showing a heat shield of the rotary kiln according to the present invention,

5 is an assembly configuration showing a heat shield of the rotary kiln according to the present invention.

* Explanation of symbols for the main parts of the drawings *

2 ..... Chiller 3 .... Cooling Fan

4 ..... dispensing equipment 5 ..... rotary kiln

7 ..... Fan Fan 9 ..... Burner

11 .... fixed cylinder 12 .... inner heat sink

13 .... Intermediate heat sink 14 .... Outer heat sink

15, 16, 17 ... Airline 12a, 13a, 14a ... Nozzles

31 .... compressed air line 33 .... flow control valve

As a technical configuration for achieving the above object, the present invention,

In the rotary kiln is rotatably installed between the limestone preheating discharging device and the cooler, and calcined into the burnt lime as a heat source of the burner,

The inner, middle and outer heat sinks, which are fixed to the burner, have a fixed cylinder in which a plurality of air lines extend outwardly, are connected to each other via an air line, and have a plurality of injection holes formed on the front surface, respectively. Equipped with a heat dissipation unit to block the radiant heat transmitted to the cooler side;

The fixed cylinder and one end is connected in communication with the compressed air supply, and provided with a compressed air line having a flow control valve compressed air supply unit for injecting compressed air into the rotary kiln; heat cut of the rotary kiln characterized in that it comprises a By providing a device.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 is an installation state diagram showing a thermal cutoff device of the rotary kiln according to the present invention, Figure 4 is an exploded perspective view showing a thermal cutoff device of the rotary kiln according to the present invention, Figure 5 is a rotary kiln of the present invention As a block diagram showing the heat shielding device, the heat shield device 1 of the present invention blocks the radiant heat transmitted to the cooler 2 side as shown in FIGS. 3 to 5, and serves as a small amount of cooling air. As a heat source of the burner 9 to improve the cooling efficiency, the quicklime is mounted on the distal end of the rotary kiln 5 for firing, and the apparatus 1 includes a heat dissipation unit 10 and a compressed air supply unit 30.

That is, the heat dissipation unit 10 for preventing radiant heat from being transmitted from the rotary kiln 5 to the cooler 2 side includes a fixed cylinder 11, inner, middle and outer heat radiating plates 12, 13, 14, and the like. The fixed cylinder 11 of the double-pipe structure inside the hollow is fixed by inserting the inner hole into the outer surface of the burner (9) near the distal end of the rotary baking furnace (5), the outer surface is in communication with the inside A plurality of air lines 15 are extended a predetermined length in the outer radial direction.

In addition, an end portion of each of the air lines 15 extending from the fixed cylinder 11 is connected to the inner surface of the inner heat radiation plate 12 having a fallopian tube shape, and the compressed air described later on the front surface of the inner heat radiation plate 12. A plurality of injection holes 12a are formed to inject the compressed air supplied through the line 31 to the front side, and the plurality of air lines 16 extend radially to the outer surface of the inner heat dissipation plate 12.

In addition, each end of the air line 16 of the inner heat dissipation plate 12 is connected to an inner surface of the intermediate heat dissipation plate 13 having the same fallopian tube shape as the inner heat dissipation plate 12, and the air line 16 is connected to the front surface of the inner heat dissipation plate 12. A plurality of injection holes (13a) is formed to inject the compressed air supplied through the front to the front, and the plurality of air lines (17) extend in the radial direction on the outer surface like the inner heat dissipation plate (12).

An end surface of each of the air lines 17 of the intermediate heat sink 13 is connected to an inner surface of the outer heat sink 14 having the same fallopian tube shape as the middle heat sink 13, and the air line 17 is connected to the front surface of the air heat sink 17. A plurality of injection holes (14a) is formed to inject the compressed air supplied through the forward.

The gap between the fixed cylinder, the inner heat sink, the middle heat sink and the outer heat sink 1, 12, 13 and 14 is such that the cooling air supplied from the cooling fan 3 can sufficiently escape to the rotary baking furnace 5 side. It is determined by the length of the airlines 15, 16 and 17.

In addition, the outer heat radiating plate 14 is preferably provided with a size smaller than the inner diameter of the rotary firing furnace (5) made of a hollow cylinder so as to spray compressed air from the distal end of the rotary firing furnace (5) therein.

On the other hand, the compressed air supply unit 30 for supplying the compressed air so as to inject the compressed air to the distal end side of the rotary kiln 5 is connected to the fixed cylinder 11 and one end to supply the compressed air, the air compressor ( (Not shown) is provided with a compressed air line 31 connected to the other end, the middle of the length is provided with a flow control valve 33 to adjust the flow rate of the compressed air supplied.

The operation of the present invention having the configuration as described above will be described.

The apparatus 1 of the present invention, as shown in Fig. 3, is a burner for providing a heat source so that the calcined quicklime, which is the distal end of the one-way rotating rotary kiln 5, is disposed near the end discharged to the cooler 2 side ( 9) is equipped with a fixed cylinder (11) to which compressed air is supplied, and has a different outer diameter in succession on the outside thereof, overlapping the inner, middle and outer heat sinks 12, 13, 14 of the same fallopian tube shape. Install it.

In this state, the quicklime calcined in the rotary kiln 5 is discharged and supplied into the cooler 2 through the space between its distal end and the apparatus 1, and the rotary kiln 5 in which a high temperature heat source is generated during firing. Radiant heat transmitted from the side to the cooler 2 is blocked by the inner, middle and outer heat sinks 12, 13 and 14 mounted near the distal end of the rotary kiln 5 to raise the temperature inside the cooler 2. Since it is possible to eliminate the factor of causing this, the quicklime cooling efficiency made of the cooling air injected from the cooling fan 3 inside the cooler 2 can be improved.

That is, when measuring the quicklime which is cooled in the cooler 2 and discharged to the outside from the dispensing facility 4, the temperature of the cooled quicklime is 35 ° C ± 10, which is significantly lower than that of the conventional 130 ° C ± 10 ° C. It can be seen that the discharge.

In addition, the fixed cylinder 11, the inner, middle and outer heat dissipation plates 12, 13 and 14, which are heated by the radiant heat, are connected to the fixed cylinder through the compressed air line 31 when the flow regulating valve 33 is opened. (11), the inner, middle and outer heat sinks 12, 13, 14 are sufficiently cooled by the compressed air flowing into the inside to prevent deformation due to high temperature radiant heat.

Since the compressed air which has been continuously cooled in the inner, middle and outer heat sinks 12, 13 and 14 is continuously injected into the rotary kiln 5 through the respective injection holes 12a, 13a and 14a. In addition, the exhaust fan 7 may smoothly perform the exhaust operation to discharge the waste gas and the cooling air in the rotary kiln 5 to the outside.

This increases the flow rate of the cooling air in the connected cooler 2 while increasing the flow rate change in the internal space of the rotary kiln 5, thereby sufficiently cooling a large amount of quicklime as a small amount of cooling air. will be.

According to the present invention having the above-described configuration, the high temperature radiant heat transmitted to the cooler in the rotary kiln is blocked by the inner, middle and outer heat sinks, and the compressed air injected therefrom increases the flow rate in the cooler to increase the cooling efficiency of quicklime. Since the temperature of quicklime discharged from the cooler is kept low, the fire and burnout of the discharged equipment is prevented, the amount of cooling air to cool the quicklime is reduced, the amount of waste gas generated is reduced, and thus the capacity of the discharger is reduced. In addition, the production of quicklime can be significantly increased, and the effect of reducing environmental pollution by reducing the amount of exhaust gas emitted to the atmosphere is obtained.

Claims (3)

In the rotary firing furnace (5), rotatably provided between the limestone preheating discharging device (6) and the cooler (2), and firing the quicklime injected into the burner (9) as a heat source. It is fixed to the burner (9), has a plurality of air lines (15) having a fixed cylinder (11) extending outwardly, connected to each other via air lines (16) (17), a plurality of front A heat radiating part 10 provided with inner, middle, and outer heat sinks 12, 13, 14 in the form of a fallopian tube, each having injection holes 12a, 13a, and 14a formed therein, to block radiant heat transmitted to the cooler 2 side. );Wow, The fixed cylinder 11 and one end is in communication with the compressed air supply, and provided with a compressed air line 31 having a flow control valve 33 to supply the compressed air into the rotary firing furnace (5) ( 30); Thermal cutoff device of a rotary kiln characterized in that it comprises a. The method of claim 1, The interval between the fixed cylinder, the inner heat dissipation plate, the intermediate heat dissipation plate, and the outer heat dissipation plate (1) (12) (13) (14) is such that the cooling air supplied from the cooling fan (3) can sufficiently escape to the rotary baking furnace (5) side. Thermal cutoff device of a rotary kiln characterized in that determined by the length of the air line (15) (16) (17). The method of claim 1, The outer heat dissipation plate 14 is a train of a rotary kiln, characterized in that it is equipped with a size smaller than the inner diameter of the rotary kiln 5 made of a hollow cylinder so as to spray compressed air from the end of the rotary kiln 5 to the inside. Unit.